ABB IRB 920 Product Manual page 595

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Product manual - IRB 920
3HAC075721-001 Revision: C
Action
Refit the timing belt to the pulley on the ball screw
and the motor. Ensure that the belt runs correctly
in the grooves.
Secure the screws and washers without fully
tightened.
Hang a strap to the hook on the motor.
Use a handheld dynamometer hooking to the strap
and pull the dynamometer to make the tension
falling in the allowed force range.
Note
During the measurement, make sure that all inter-
ferences that may affect the force are removed.
Pay attention to the force application direction.
Use a sonic tension meter to measure the timing
belt tension.
If the timing belt tension does not meet the require-
ment, loosen the motor screws and readjust.
© Copyright 2022 ABB. All rights reserved.
5.6.8 Replacing the axis-4 second timing belt
Note
Timing belt A3:
3HAC070464-001
xx2100001079
Screws: Hex socket head cap
screw M4x16 12.9 Lafre
2C2B/FC6.9 (4 pcs)
Washers: Plain washer machining
4.2x9x2 steel (4 pcs)
Tightening torque: 2.6 Nm ±10%
xx2100001078
Used belt: 36.6
New belt:40
xx2100001126
Used belt: 139
New belt:110
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5 Repair
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